In Japan, Kōshien (甲子園) generally refers to the two annual baseball tournaments played by high schools nationwide culminating at a final showdown at Hanshin Kōshien Stadium in Nishinomiya, Hyogo, Japan. They are organized by the Japan High School Baseball Federation in association with Mainichi Shimbun for the National High School Baseball Invitational Tournament in the spring and Asahi Shimbun for the National High School Baseball Championship in the summer.

Hanshin Koshien Stadium , commonly referred to as simply Koshien Stadium, is a baseball park located near Kobe in Nishinomiya, Hyōgo Prefecture, Japan. The stadium was built to host the national high school baseball tournaments, and opened on August 1, 1924. It was the largest stadium in Asia at the time it was completed, with a capacity of 55,000.